The correct answer is B) be stiff. A large metacentric height indicates the vessel has a high initial stability, which means it will be less responsive to external forces and have a stiffer motion. A stiff vessel with a large metacentric height will have less roll and pitch compared to a vessel with a smaller metacentric height, which would be considered more "tender" and have a more easy, smooth motion. The other options are incorrect because a large metacentric height does not directly lead to a slow motion, nor does it cause a tendency to yaw.